Rapid purification of recombinant baculovirus using fluorescence-activated cell sorting

Area of Science:

• Molecular Biology
• Virology
• Biotechnology

Background:

• Baculovirus-insect cell expression systems are widely used for foreign protein production.
• Traditional methods for identifying and purifying recombinant baculovirus are time-consuming, often taking weeks to months.
• Existing vectors facilitate recombinant virus identification via co-expression of beta-galactosidase, but purification remains a bottleneck.

Purpose of the Study:

• To develop a rapid method for isolating recombinant baculovirus in insect cells.
• To improve the efficiency of obtaining pure viral cultures for protein expression.

Main Methods:

• Utilized a fluorescent beta-galactosidase substrate for detection.
• Employed fluorescence-activated cell sorting (FACS) to isolate insect cells containing recombinant virus.
• Used plaque purification on sorted cells to obtain pure viral cultures.

Main Results:

• Insect cells harboring recombinant baculovirus were rapidly isolated using FACS.
• Pure recombinant viral cultures were obtained significantly faster than traditional methods.
• A pure viral culture was generally achieved within 2-3 weeks post-transfection.

Conclusions:

• Fluorescence-activated cell sorting provides a rapid and efficient method for isolating recombinant baculovirus.
• This technique streamlines the baculovirus expression system workflow, enabling faster protein production.
• The developed method overcomes limitations in recombinant virus purification, enhancing biotechnological applications.